1996 Camaro Z28 idle and rpm issues
02-16-2018, 06:37 PM
#1
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1996 Camaro Z28 idle and rpm issues
Hello I知 just on here to see if I can have my car fixed I will upload a video you can watch hopefully it値l helps but my issue is the car will be chocking and the rpms will lower and once it gets low enough the car will shut off
02-16-2018, 07:32 PM
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Re: 1996 Camaro Z28 idle and rpm issues
Have not checked the fuel pressure I’ve replaced fuel pump about 30,000 miles ago I’ve got a fuel filter i will replace tomorrow and also I guess check the fuel pressure, the codes nothing shows up which is weird, engine is replaced with the same one lt1 had it now for a year I put in headers about two months ago so no egr and trans is auto also been rebuild the same time as the new engine so I’ve already put spacers between the icm and the new icm, cleaned iac and throttle body, I’ve also put a spacer to increase idle it seemed like it helped but it started to acting up the next day and I’ve also had to put a little more coolant
02-16-2018, 08:53 PM
#5
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Re: 1996 Camaro Z28 idle and rpm issues
Have you checked the idle air control (IAC) valve circuitry:
http://shbox.com/1/iac2.jpg
4th Gen LT1 F-body Tech Articles
Where did you put a "spacer" to increase idle? There's an adjustable idle stop screw, but that is just going to fight the IAC valve, and can throw the TPS volts off.
http://shbox.com/1/iac2.jpg
4th Gen LT1 F-body Tech Articles
Where did you put a "spacer" to increase idle? There's an adjustable idle stop screw, but that is just going to fight the IAC valve, and can throw the TPS volts off.
02-17-2018, 04:49 PM
#6
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Re: 1996 Camaro Z28 idle and rpm issues
it starts but when you put it in gear it stalls....could be a sticking or failed IAC
You won't know though unless you have some form of scan software that can read IAC counts...and if not throwing $70 at it buying a new IAC
Checking fuel pressure is always prudent when trying to diagnose a engine problem to rule in/out fuel as being the cause before moving on to ignition
you should never really F with turning the TB stop screw. As mentioned that will change your TPS vdc which in turn will mess with, among other things, your shift points and transmission line pressure
do you have a stock TB?
You won't know though unless you have some form of scan software that can read IAC counts...and if not throwing $70 at it buying a new IAC
Checking fuel pressure is always prudent when trying to diagnose a engine problem to rule in/out fuel as being the cause before moving on to ignition
you should never really F with turning the TB stop screw. As mentioned that will change your TPS vdc which in turn will mess with, among other things, your shift points and transmission line pressure
do you have a stock TB?
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